Rooting Innjoo one 3G HD

Hello , my phone used to be KK rooted , updated it to L 5.1 and cannot root with any methode , tried kingroot ,iroot ,RootGenius even with MT6592 root tool didnt work , so any suggestion ?:(

Innjoo Fire Plus Autu Benchmark

Can anyone kindly do it? I can't make mind between this phone and LG G2 or Lenovoa Note K3